Содержание
- 2. Pyramid is a polyhedron with one polygon face (called the base). All the other faces are
- 3. Apothem
- 5. 1. Right and Oblique Pyramids In right pyramids, the foot of the altitude is at the
- 6. EXAMPLE: A right pyramid has a rectangular base with sides 6 m and 10 m. The
- 7. EXAMPLE:
- 8. 2. Regular Pyramids If the base of a right pyramid is a regular polygon, the pyramid
- 9. Properties of a regular pyramid The lateral edges of a regular pyramid are congruent. The lateral
- 10. A square right pyramid has base edge 6 cm and height 11 cm. What is the
- 11. The apothem of a regular pentagonal pyramid is 10 cm, and a lateral edge is 12
- 12. 3. Regular Tetrahedron A regular tetrahedron is a triangular pyramid whose edges are all congruent. All
- 15. EXAMPLE: Find the slant height and median height of a regular tetrahedron with edge length 10
- 16. 4. Square Pyramid A square pyramid is a pyramid with a square base and triangular sides.
- 17. EXAMPLE: What is the height of a regular square pyramid whose edges are all congruent and
- 18. 5. Regular Octahedron A regular octahedron is a solid composed of eight equilateral triangular faces. At
- 19. EXAMPLE: What is the total surface area of a regular octahedron if its edge length is
- 20. EXAMPLE: The base perimeter of a regular octagonal pyramid is 64 cm and a lateral edge
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